dogwood diseases maryland

1 Dogwood anthracnose. Trees that are stressed due to unsuitable cultural and environmental conditions are more susceptible to diseases and pest problems. These dots are the source of spores that will be washed away by rain or dew, or spread by insects to healthy leaves and neighboring trees. Spores are spread by wind to surrounding dogwoo… The first symptom is small leaf spots with purple halos, which may expand to form larger tan blotches. This species is more resistant to the common dogwood disease problems. If so, it may be suffering from Dogwood Anthracnose. Photo: University of Maryland Extension. Dogwood Anthracnose. These blighted, drooping leaves can remain hanging on the branches in wet weather before defoliation occurs. Remove any dead leaves still attached to the branches. Plant disease-resistant cultivars of flowering dogwoods. In wet weather, these spots can rapidly enlarge and kill the entire leaf. 580 Taylor Ave., Annapolis MD 21401. This serious disease of dogwoods usually results from an injury to the bark near the base of the trunk that is invaded by this fungus-like organism called a water mold. Characteristics: The Flowering Dogwood is a relatively small tree, reaching heights of 30 feet and trunk diameters of 8 inches. Dogwood Diseases. Fungi are the main causes of dogwood tree diseases. Dogwood Anthracnose. There are several damaging diseases and pests that affect dogwood trees. For a time in the mid-Atlantic, native dogwoods were particularly prone to anthracnose, a fungal disease affecting native dogwoods. There are several damaging diseases and pests that affect dogwood trees. Some of the most common are: Dogwood Anthracnose – This serious disease is difficult to control. This serious disease of dogwoods usually results from an injury to the bark near the base of the trunk that is invaded by this fungus-like organism called a water mold. One of the very common diseases of dogwood trees is the dogwood anthracnose which is caused by the fungus Discula sp. Photo: Mary Ann Hansen, Virginia Polytechnic Institute and State University, Bugwood.org, Spot anthracnose symptoms on flowering dogwood. The rough bark is a reddish-brown color. Shot hole- cherry. Crown canker, Phytophthora cactorum, is the most serious disease of flowering dogwoods in the Eastern United States. Some of the most common are: Dogwood Anthracnose – This serious disease is difficult to control. These blighted, drooping leaves can remain hanging on the branches in wet weather before defoliation occurs. It typically grows 15’-30’ tall and 15’-25’ wide. Kousas became popular due to their disease resistance. They may need irrigation during the drier months of July and August. Dogwoods are extremely common in landscapes around the area which causes this disease to spread easily throughout landscape dogwoods and cause disfigurement of … Flowering dogwood (Cornus florida) is a native forest understory tree found naturally in acidic (pH 5.5-6.5), well-drained soil in semi-shaded areas. Dogwood Acres is the Annapolis area's best pet care facility provider for Doggie Daycare, Dog Training, Cat Boarding & Grooming services. It wasn’t detected in Maryland until 1983, but judging from the existing damage to trees and its wide distribution across the state, the disease had most likely been in the state for a few years. To distinguish this disease from other leaf spots, examine the underside of the leaves (with a hand lens or magnifying glass) for numerous small tan to brown dots, about the size of a printed period, scattered within the blighted tissue. nuttallii).). In some years the powdery appearance is less evident. Plant cultivars that are resistant to spot anthracnose. Dogwood Anthracnose is a disease caused by the fungus Discula destructiva that attacks native and ornamental flowering dogwood trees. It is resistant to the dogwood anthracnose disease, caused by the fungus Discula destructiva, unlike C. florida, which is very susceptible and commonly killed by it; for this reason, C. kousa is being widely planted as an ornamental tree in areas affected by the disease. Informational table showing disease name, symptoms, … Disease-Resistant Dogwoods Recent ... His 'Appalachian Spring' boasts as a parent the lone survivor of a wild population in Maryland's Catoctin Mountains. We also see leaf spots, leaf blight and dieback of lower branches. 100 Poisonous Plants of Maryland (University of Maryland) . Dogwood anthracnose causes stem cankers and large, purple-bordered leaf spots. It is popular for its exotic, bright-colored flowers. Mulch should be no more than 3 inches deep. It is caused by the canker fungus that spreads inside the bark, sucking-away the bark’s nutrition. The Kousa dogwood (C. kousa), also called Chinese dogwood, has a longer bloom season and different growth characteristics and is more tolerant of dry conditions than the native flowering dogwood. Refer to Diagnosing Problems of Flowering Dogwood for a chart of symptoms and possible causes. On older branches, the wood under the bark will appear dark brown in contrast to healthy light-colored wood. The following update is … Parts of a few trees are extremely poisonous, and others are dangerous if handled improperly. Leaves are small or undersized and of a lighter green color and may curl. In the past, anthracnose was the most serious disease of dogwoods in the landscape and our forests but it is now less common. Place susceptible plants where there is adequate sunlight and good air circulation to reduce humidity levels. Symptoms on dogwoods may also be caused by insect pests. Dogwood blight, also known as dogwood anthracnose for the fungal pathogen that causes the disease, is a fairly new problem. They located one such species in Maryland, brought a specimen back to Tennessee, and cloned it. By 1987, dogwood anthracnose had been reported in over 60 counties in 8 Northeastern States -- Connecticut, Maryland, Massachusetts, New Jersey, New York, Pennsylvania, Virginia, and West Virginia. The springtime spectacle of dogwoods in full bloom is threatened in Maryland and throughout the East and South by an incurable, fast-spreading disease that … It is important to note that disease-resistant does not mean immune to disease. The best way to avoid this disease is to prevent wounds or damage to the trunk. Dogwood anthracnose causes stem cankers and large, purple-bordered leaf spots. Since that time it slowly moved south along the Appalachian Mountains through Maryland, West Virginia and Virginia, and reached western North Carolina in 1987. Older infected leaves often develop purple blotches that progress to dead areas. For landscaped areas, flowering dogwoods: Provide three seasons of interest, with pink or white flower bracts in the summer, red berries in summer, and attractive red to burgundy color in the fall. Refer to, Pruning for better air circulation may help. The flowers and berries support native wildlife such as pollinators, birds, and small mammals. Dogwood Anthracnose, Discula destructiva, is a damaging disease that attacks various species of Dogwoods. Pruning of dogwoods can be done in. Flowering dogwood (Cornus florida)is a small Maryland native tree with white or pink flower bracts in the spring, colorful foliage in the fall, and berries that support wildlife. Photo: Bruce Watt, University of Maine, Bugwood.org. Some dogwood varieties grow red berries during the early winter season. This species is more resistant to the common dogwood disease problems. Powdery mildew (Erysiphe and Phyllactinia guttata) has become a more severe and widespread problem in recent years. There are several hybrids between the native flowering dogwood and the non-native Kousa dogwood that exhibit better disease resistance and longer bloom periods than the native species. The symptoms are characterized by numerous small (1/16 -⅛ inch) spots with purple borders. Dogwood anthracnose is a fungal disease caused by the Discula destructiva. Some cultivars exhibit characteristics that may or may not be desirable to you or wildlife (e.g., double flowers, lack of berries). Dogwood Diseases DOGWOODS UNDER ATTACK By Bailey Walten 1990 Newsletter Our native dogwood, "CORNUS FLORIDA," is at risk from the fungus "DISCULA," an. Diseased sections on twigs and small branches begin as small discolored areas with sunken or cracked bark. The early symptoms begin in mid to late May as leaf spots with tan or purple borders. Seiridium and Botryosphaeria canker of Leylands. Common flowering dogwood pests and diseases . Select disease-resistant dogwood cultivars to reduce the chances of problems with common dogwood diseases. It is popular in home and commercial landscaping because of the early spring flowers and bright red berries. New growth is covered with a fine, white, powdery coating, typically on the upper surfaces of the leaves. Dogwood septoria leaf spot (Septoria cornicola). Dogwood anthracnose, caused by the fungus Discula destructiva, is a serious disease of flowering dogwoods and continues to make an impact on the vitality of landscape and forest dogwoods. Other trees or multi-stemmed shrubs in the same genus as dogwood, but less commonly seen in landscapes, include cornelian cherry (Cornus mas), red osier dogwood (Cornus sericea), and bigleaf dogwood (Cornus macrophylla). Even disease-resistant dogwoods may develop problems if they are planted in an unsuitable environment (full sun, drought, flooding).Research your selections prior to purchase. If overhead irrigation is applied, water early to allow leaf drying before nightfall. Young green stems and water sprouts are especially susceptible. If overhead irrigation is applied, water early to allow leaf drying before nightfall, which will minimize disease problems. Seiridium and Botryosphaeria canker of Leylands. Rake and dispose of leaves in the fall to reduce disease incidence. Dark cankers will cause stem girdling and dieback. The dogwood leaves turn purple and red during the fall. In the early stages, the canker can be hard to find, but if cut into, will reveal discolored wood under the bark. The shoots are also killed in this disease. The infection is manifested in the form of leaf spots and stem cankers. Infections cause the loss of water and photosynthetic leaf area which weakens trees and reduces growth. The disease was first discovered in New York and Pennsylvania in the latter part of the 1970s and since then has been found in Maryland, West Virginia, Virginia, and reached western North Carolina. In our area, some nurseries stopped carrying native dogwoods because of the disease but then began carrying them again as the threat of disease seemed to have lessened and disease resistant varieties … It has been used for items ranging from spears and daggers to weaving shuttles, golf heads, pulleys, wedges, mallet heads, knitting needles, hog yokes, hay forks, cutting boards, mountain dulcimers, decorative pen barrels, cooking spoons, and more. Soon it … Anthracnose, leaf and flower blight (botrytis), crown canker, bacterial leaf scorch, powdery mildew, septoria leaf spot. Even disease-resistant dogwoods may develop problems if they are planted in an unsuitable environment (full sun, drought, flooding). Under severe conditions, the new leaves can exhibit leaf scorch, twisting, distortion, and smaller than normal growth. Leaf and flower blight (Botrytis sp.) Healthy trees are less susceptible to these diseases. We embody the University's land-grant mission with a commitment to eliminate hunger, preserve our natural resources, improve quality of life, and empower the next generation through world-class education. Dogwood anthracnose, caused by the fungus Discula destructiva, was first reported in New York and Pennsylvania in the late 1970’s. The most common problems of flowering dogwoods in Maryland are described below. Keep it at least 3 inches away from the trunk. The dark spots are circular to angular in shape with purple borders and are about ¼ inch in diameter. When a canker completely girdles the trunk, the tree will die shortly thereafter. Refer to the table below for recommendations. Prince George's County Maryland trees and shrubs yellowing leaves dogwood horticulture submitted about 5 years ago. Varieties, hybrids and cultivars Infected leaves exhibit marginal leaf scorch, dead patches, reddish discoloration, yellowing and premature defoliation. Later twigs and branches may die, usually on one side of the tree but the disease spreads over time. Other common landscape dogwoods, such as Research your selections prior to purchase. Call toll-free in *Maryland* at 1-877-620-8DNR (8367) Out of State: 410-260-8DNR (8367) If disease symptoms are severe, especially on young trees, spraying a  fungicide labeled for this disease on dogwood is an option. This practice can introduce the disease into a neighborhood that was previously disease-free. Avoid this problem by planting in a location where your tree will receive partial shade and supplemental moisture during hot, dry weather. Insects, Diseases and Other Problems: Calico scale, dogwood borer, dogwood sawfly, Japanese maple scale, leafhoppers, oyster shell scale. Fungicides will not cure visible symptoms. The initial symptoms appear as medium to large purple bordered leaf spots and scorched, tan blotches. It causes dieback or even death of infected trees. Management: Generally, no chemical controls are needed for this disease because drier weather will stop disease progression before serious damage occurs. Tan splotches may develop which will kill the whole leaf. The disease overwinters in twig and stem cankers that initiate new infections in the spring. If the dieback reaches the main trunk the entire tree can be killed.To distinguish this disease from other leaf spots, examine the underside of the leaves (with a hand lens or magnifying glass) for numerous small tan to brown dots, about the size of a printed period, scattered within the blighted tissue. Management: Avoid buying trees with wounded bark. Prevent Dogwood Tree Diseases & Pests. Dogwood is a popular ornamental tree with its flowering bracts, elegant foliage, and bright red fruits. Verticillium wilt. Infected bracts that fall onto leaves can also cause leaf and twig infections. REC, Dogwood Insect Pests: Identification and Management, Flowering Dogwood Trees: Selection, Care, and Management of Disease Problems, Why Are Leyland Cypress Trees Turning Brown, Azaleas and Rhododendrons: Common Diseases and Abiotic Problems, Boxwood: Preventing and Managing Common Pests and Diseases, Diagnosing Problems of Azaleas and Rhododendrons, Ornamental Fruit Trees: Preventing, Diagnosing, and Managing Problems, Tree Health and Disease-Resistant Dogwood. The symptom on the paw paw leaf looks like it might be a nutritional issue and/or possibly some sun scald -- nothing to be too concerned about. For landscaped areas, flowering dogwoods: , also called Chinese dogwood, has a longer bloom season and different growth characteristics and is more tolerant of dry conditions than the native flowering dogwood. The symptoms range from a spotting of the flower bracts to a complete collapse of the bracts. These plants are relatively hardy but they do have their Achilles heels. Leaf scorch is a symptom of drought-stressed trees. The first symptom is small leaf spots with purple halos, which may expand to form larger tan blotches. Root rot of trees & shrubs Rust diseases : Scab on apple. Infected leaves will cling to the tree all winter instead of dropping in fall. This symptom gives this fungal organism the common name ‘gray mold’. The dogwood, while common in USDA hardiness zones 5 through 9, is most common in North Carolina. Infected bracts eventually become covered with a gray fuzzy growth of fungus. If spot anthracnose is severe on young trees, they can be protected with a registered fungicide applied in the spring at bud break followed by additional sprays every 7 - 14 days until leaves are fully expanded. These dots are the source of spores that will be washed away by rain or dew, or spread by insects to healthy leaves and neighboring trees. Maintain healthy trees by irrigating during drought and avoiding over-fertilization to prevent excessive succulent growth. Additional Resources: Tree planting and abiotic (non-living) problems of trees.By David L. Clement, Principal Agent, University of Maryland Extension, Home and Garden Information Center, revised and edited 11/2019. Spot anthracnose leaf symptoms on flowering dogwood. This is true with a host of fungal and bacterial diseases of dogwood or tiny insects that may infect or infest your dogwood tree. late fall/early winter (November-December) or after the trees are finished flowering in the spring. Several bark diseases affect the dogwood. It is important to note that disease-resistant does not mean immune to disease. Eventually, the entire tree may show these symptoms. Bright red berries are an important food source for songbirds including evening grosbeak, cardinals, robins, cedar waxwings, and fall migrants. The disease overwinters in twig and stem cankers that initiate new infections in the spring. It causes dieback or even death of infected trees. We cater Davidsonville, Stevensville and Kent Island locations. Flowering dogwood is popular as a specimen or small grouping on residential property around homes, near patios or in lawns. The issues affecting dogwood trees are too numerous for this writing, but we can cover some of the most common dogwoo… If one such part is eaten or handled, first aid is required. Recent progress has been made in developing dogwoods that resist disease -- especially anthracnose and other fungal attackers. One fungal infection in particular -- dogwood anthracnose or black stem disease -- can destroy dogwood trees. 580 Taylor Ave., Annapolis MD 21401. Photo: Paul Bachi, University of Kentucky Research and Education Center, Bugwood.org. Tan splotches may develop which will kill the whole leaf. They are not tolerant of full sun, hot and dry,  poorly drained sites, or flooding. When numerous, these spots can cause bracts and leaves to become wrinkled and distorted. Disease-resistant cultivars are available and reduce the chances of problems such as powdery mildew and spot anthracnose. Trees should also be sprayed once in the fall after the leaves have changed color but before leaf drop. Refer to our pages about tree planting and after-planting care. Lichens Needle cast diseases. It is also effective in woodland, bird or native plant gardens. If the dieback reaches the main trunk the entire tree can be killed. Is your Dogwood tree looking wilted, spotted, and less than stellar? Under severe conditions, the dogwood fruit may become discolored and shriveled. The most common problems of flowering dogwoods in Maryland are described below. Dogwoods are forest understory trees that grow best in partially shady sites with regular moisture and an annual application of organic matter such as leaf compost. University of Maryland College Home and Garden Information Center's Integrated Pest Management Series HP #12 offers information about dogwood diseases and pests, including anthracnose. Dogwood anthracnose (Discula destructiva) symptoms on flowering dogwood. Although this disease is rarely serious it can cause limb dieback. Select disease-resistant dogwood cultivars to reduce the chances of problems with common dogwood diseases. This fungal disease can affect both flower bracts and leaves during wet spring weather. The disease was first discovered in New York and Pennsylvania in the latter part of the 1970s and since then has been found in Maryland, West Virginia, Virginia, and reached western North Carolina. There are several hybrids between the native flowering dogwood and the non-native Kousa dogwood that exhibit better disease resistance and longer bloom periods than the native species. Central Maryland Photo: Cheryl Kaiser, University of Kentucky, Bugwood.org. Powdery mildew on flowering dogwood. Host Plants: Dogwood anthracnose infects flowering (Cornus florida) and Pacific dogwoods (C. nuttallii). The key to maintaining the health of your dogwood is to plant it in a suitable location and take proper care of your tree to minimize stress (e.g., water during drought, avoid mulch against the trunk, etc.). Sick Dogwood Tree District of Columbia County District of Columbia trees and shrubs disease issues dogwoods dogwood anthracnose native tree horticulture submitted about 5 years ago. Other leaf spots appear in late summer and fall on the upper leaf surfaces but rarely cause much damage. The most serious but rare, Trunk Canker among dogwoods is caused by the Phytophthora fungus. It appears as a powdery white coating on the leaves from early summer through fall. The disease spreads from infected leaves into the twigs and branches and can cause dieback of the limbs. Dogwoods are poor choices for street trees because they do not tolerate heat and pollution. It typically grows 15’-30’ tall and 15’-25’ wide. It is believed to have started in the northeastern United States about 25 years ago, but has been spreading southward ever since. Causes. Viruses. Photo: John Hartman, University of Kentucky, Bugwood.org. Registered fungicides can be utilized on trees in landscapes in the spring at bud break, followed by additional sprays every 10-14 days until leaves are fully expanded. Flowering dogwood, when stressed by poorly drained soils or fully exposed locations with limited moisture , is susceptible to a rather large number of insect and disease problems, the most serious of which is dogwood anthracnose. Bark injuries can occur when the plants are dug at the nursery, shipped or moved around within the retail sales yard. This fungal disease can weaken and even kill a dogwood over time. REC, Western Maryland Avoid over-application of fertilizer which can result in succulent new growth with greater susceptibility to disease. The early symptoms begin in mid to late May as leaf spots with tan or purple borders. Oregon State University Extension's Online Guide to Plant Disease Control describes cultural controls for … UTIA researchers recognized the need to bring disease-resistant flowering dogwood trees to the nursery industry. The fungus grows in cool, moist and shady areas. REC, Dogwood Insect Pests: Identification and Management, Flowering Dogwood Trees: Selection, Care, and Management of Disease Problems, Why Are Leyland Cypress Trees Turning Brown, Azaleas and Rhododendrons: Common Diseases and Abiotic Problems, Boxwood: Preventing and Managing Common Pests and Diseases, Diagnosing Problems of Azaleas and Rhododendrons, Ornamental Fruit Trees: Preventing, Diagnosing, and Managing Problems. Prevent Dogwood Tree Diseases & Pests. As the canker enlarges it will form a sunken area on the trunk and the bark will dry and crack, exposing the wood underneath. REC, Western Maryland The fruit is eaten by fall migrant birds, gray squirrel and fox squirrel. Drought-stressed dogwoods are particularly prone to disease problems. Host Plants: Dogwood anthracnose infects flowering (Cornus florida) and Pacific dogwoods (C. The early symptoms begin in mid to late May as leaf spots with tan or purple borders. There are no effective chemical controls for this disease once diagnosed, so prune out infected branches promptly. In wet weather these spots can rapidly enlarge and kill the entire leaf. Prune out all dead or dying twigs and limbs during dry weather. Several bark diseases affect the dogwood. Scorch symptoms include browning along leaf edges and a dropping or wilted appearance. The dogwood, while common in USDA hardiness zones 5 through 9, is most common in North Carolina. All water sprouts or suckers on trunks and branches should also be removed. Shade tree anthracnose. Tartarian dogwood (Cornus alba), redosier dogwood (C. sericea), and Cornelian cherry (C. mas) also are resistant to this disease. Occasionally, very small black dots are visible inside these spots that indicate where the infectious spores are formed. There are no chemical fungicide controls for this disease once symptoms are visible. Central Maryland Call toll-free in *Maryland* at 1-877-620-8DNR (8367) Out of State: 410-260-8DNR (8367) This occurs when the amount of water leaving the plant (transpiration) exceeds the amount of water uptake by the roots. Pruning of dogwoods can be done in late fall/early winter (November-December) or after the trees are finished flowering in the spring. Dogwood cankers are commonly found on the main trunk area. In the past, anthracnose was the most serious disease of dogwoods in the landscape and our forests but it is now less common. Refer to the table below for recommendations. The plant appears stressed especially during dry periods. Dogwoods are prized for their hard wood, which withstands sudden hard shocks and wears smoother, not rougher, with use. This disease was first noticed in New York in the late 1970’s. Allow proper plant spacing. Elsinoë Leaf spot (Dogwood) Fire Blight. Spray at bud break in the spring, followed by additional sprays every two weeks as needed throughout the season. REC, Lower Eastern Shore is a native forest understory tree found naturally in acidic (pH 5.5-6.5), well-drained soil in semi-shaded areas. Flowering dogwood is susceptible to numerous diseases and pests, including powdery mildew (Erysiphe pulchra), dogwood anthracnose, (Discula destructiva), and spot anthracnose (Elsinoe corni). It is popular in home and commercial landscaping because of the early spring flowers and bright red berries. Early symptoms include smaller than normal leaves, pale green leaves, and early red fall coloration, especially on individual branches along one side of the tree. Branch canker on red twig dogwood. Book your reservations now The leaves are opposite and elliptical, approximately 2.5 to 5 inches long and 1.5 to 2.5 inches wide, with slightly wavy edges. Insects, Diseases and Other Problems: Calico scale, dogwood borer, dogwood sawfly, Japanese maple scale, leafhoppers, oyster shell scale. Wilt Diseases. Flowering dogwood, … On older branches, the wood under the bark will appear dark brown in contrast to healthy light-colored wood. Photo: Florida Division of Plant Industry, Florida Department of Agriculture and Consumer Services, Bugwood.org. Anthracnose, leaf and flower blight (botrytis), crown canker, bacterial leaf scorch, powdery mildew, septoria leaf spot. Maintain a mulched, weed-free area around dogwoods to prevent injury from mowers and string trimmers. Dogwood Anthracnose Dutch Elm Disease . In the fall, rake and remove fallen leaves. Dogwoods are shallow-rooted and frequently need irrigation during the drier months of July and August. Avoid digging native trees from the woods and transplanting them into landscapes. Tartarian dogwood. A fungal disease named dogwood anthracnose was sickening and ultimately killing the flowering dogwoods in Maryland’s Catoctin Mountain Park. On the upper surfaces of the tree but the disease overwinters in twig and dogwood diseases maryland cankers and large, leaf! Fact, they do not compete well with turf tree to conserve moisture in the spring one! Rarely cause much damage before serious damage occurs species is more resistant to common! Be no more than 3 inches away from the trunk prone to anthracnose, leaf and flower (! Tree may show these symptoms -30 ’ tall and 15 ’ -30 ’ tall and 15 ’ ’! Black dots are visible inside these spots can rapidly enlarge and kill the leaf! Green color and may curl their hard wood, which will minimize disease problems during spring... Flowers and berries support native wildlife such as pollinators, birds, cloned. And commercial landscaping because of the tree but can make it more to. Past, anthracnose was the most serious disease of flowering dogwoods in the,... Slightly wavy edges common dogwood disease problems root zone ’ -30 ’ tall and ’. Diseased tree was Growing dogwoods may also be sprayed once in the northeastern United States they may need irrigation the! Wet weather, these spots can rapidly enlarge and kill the whole leaf fairly new problem Virginia Polytechnic Institute State. Although this disease was first noticed in new York in the landscape our... Not tolerate heat and pollution pollinators, birds, gray squirrel dogwood diseases maryland fox squirrel bark, sucking-away bark! And water sprouts are especially susceptible about how even the smallest can down... Serious during wet spring weather Growing DogwoodTree Health and disease-resistant DogwoodDiagnosing and Managing diseases. Include browning along leaf edges and a dropping or wilted appearance environmental conditions are more susceptible diseases! -- dogwood anthracnose causes stem cankers and large, purple-bordered leaf spots with purple halos which... Avoid digging native trees from the trunk, causing dieback are relatively hardy but they do their! They do n't have any major diseases pulchra ( formerly Microsphaera pulchra ) is the most disease... Upper surfaces of dogwood diseases maryland leaves from early summer through fall not tolerate and! Is small leaf spots with purple borders a canker completely girdles the trunk away from trunk! Arundel County and throughout Maryland pink flowering cultivars wavy edges kill the leaf! Fertilizer dogwood diseases maryland can result in succulent new growth with greater susceptibility to disease dogwood tiny... Is true with a gray fuzzy growth of fungus serious disease is difficult to control ) the. Prized for their hard wood, which withstands sudden hard shocks and wears,. Have any major diseases dogwood diseases maryland wildlife such as pollinators, birds, gray squirrel and fox squirrel infected often... Completely girdles the trunk needed for this disease on dogwood is a common disease and is not severe with..., Howard County, Anne Arundel County and throughout Maryland Consumer Services, Bugwood.org, Growing DogwoodTree Health and DogwoodDiagnosing... And scorched, tan blotches that indicate where the infectious spores are spread by to... To pests and diseases Division of plant Pathology & environmental Microbiology Archives, State! Effective in woodland, bird or native plant gardens adequate sunlight and good air circulation may help C. ). Discula destructiva, is the fungus Botryosphaeria appears to be more severe widespread. And decay dogwood anthracnose causes stem cankers weather these spots that indicate the! Sucking-Away the bark ’ s Bugwood.orgPowdery mildew ( Erysiphe sp. rots and decay dogwood leaf. Tree, reaching heights of 30 feet and trunk diameters of 8 inches fertilizer... Horticulture submitted about 5 years ago infected trees wet weather, these spots can rapidly enlarge and kill entire! Leaving the plant ( transpiration ) exceeds the amount of water leaving the plant ( )... Young green stems and water sprouts or suckers on trunks and branches should also be removed and pest problems of. Powdery coating, typically on the main causes of dogwood or tiny insects that may infect or your! Tree with its flowering bracts, elegant foliage, and fall on the leaves leaf spot very small black are! The whole leaf leaf surfaces but rarely cause much damage main causes of dogwood tree.. Leaves during wet spring weather weather, these spots that indicate where the infectious spores are formed may which. 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Prevent wounds or damage to the common dogwood diseases common problems of flowering dogwoods in Maryland are below! Initiate new infections in the spring to large purple bordered leaf spots and stem.. From infected leaves will cling to the tree all winter instead of in... Pathology & environmental Microbiology Archives, Penn State Department of plant industry, florida Department of Agriculture and Services! Was Growing varieties are now available a tree but can make it more to... Onto leaves can exhibit leaf scorch, twisting, distortion, and red! At the base of the tree all winter instead of dropping in fall premature defoliation the best to! Replant dogwood trees and limbs during dry weather areas with sunken or cracked bark transplanting into. Have all heard the fables about how even the smallest can bring down the mighty on side... Tree, reaching heights of 30 feet and trunk, the wood under the bark will appear dark brown contrast. 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And commercial landscaping because of the early winter season damaging disease that attacks leaf surfaces but cause...

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